Rifle-barrel for shot-guns



C. R. SHELTON. Rifle Barrel for Shot Guns.

No. 230,442. Patented July 21,*'1-Essc).`

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UNITED STATES PATENT OFFICE.

CLARK R. SHELTON, OF NEW HAVEN, CONNECTICUT.

RIFLE-BARREL FOR SHOT-GUNS.

SPECIFICATION forming part of Letters Patent No. 230,442, dated July 27, 1880. Application filed November 4, 1879.

To all whom it may concern:

Be it known that I, CLARK R. SHELTON, of New Haven county and city, State of Connecticut, have made certain new and useful Improvements in Fire-Arms; and I do hereby declare that the following is a full, clear, and exact description and specification of the same, reference being had to the annexed drawings, making part thereof.

Short rifled barrels, called auxiliary 7 ri'tled barrels, have been used heretofore inside of other gun-barrels, and a small riiled barrel has been patented combined with and inside of a larger rifle-barrel, the axis of the two being at an angle in a plane passing through the gunsights, to adapt the gun to practice for pointblank shooting without changing its sights. In the latter case the small riiled barrel was shorter than the outer large barrel, and a tube was attached to its muzzle in axed position, its axis being on the same angle as the axis of the ritled barrel. The tube prevented the fouling effect of the powder on the inside of the outer barrel; but it could not be turned in reference to either the auxiliary riiied barrel or the outer barrel without throwing their axis out of line, which would be fatal to the shooting.

My invention relates, i111 part, to the addition of a gas-confining and foul-protecting tube to the muzzle of the riied barrel of a lire-arm, both being centrally bored and having their axes coincident in any position circumferentially, for the purpose of prolonging the effect of the exploded powder beyond the muzzle of said barrel, and also (when the llatter is used as an auxiliary rifle-barrel inside of a shot-gun barrel) for the purpose of preventing the fouling effects of the burnt powder on the inside of the shot-gun beyond the muzzle of said auxiliary riiie.

To these ends my invention consists in certain combinations of mechanism, which combinations are specicallv set forth in the claims at the end of this schedule.

In order that persons skilled in the art may understand, make, and use my improvements, I will proceed to describe the way in which I have embodied them, referring to the drawings, in which- Figure l shows a longitudinal side view of ride-barrel.

end view of barrels, and Figs. 4, 5, (i, and 7 are cross-sections of said barrels and tube on the lines a b c d, Fig. 2. Fig. S represents a central longitudinal section of the cartridgechamber of the rifle-barrel, showing a spent shell and the spiral extractor. Fig. 9 is an end view of the cartridge and breech of the Fig. 10 is a side view of the extractor or starter. Fig. Il is a face View of the same.

The rifle-barrel A is of the usual construction on the inside, having a cartridge-chamber in the breech with a rabbet for the ange of the cartridge. The outside is fitted to slide within a shotgun barrel, and to lit the cartridgechamber B of the shot-gun at the breech end and the bore of the barrel at C by means of a ring, D, slid over the barrel A before itis put into the shot-barrel, its exterior diameter or surface being fitted to the bore of the shotbarrel at that point.

To the muzzle of the barrel A is attached a tube or foul-protector, E, by means of a threaded screw, F. The outside of this tube or foulprotector is somewhat less in diameter than the inside of the shot-barrel, and its interior diameter is somewhat greater than the diameter of the outside of the riliegrooves, their axes being coincident, so that the ball will not touch the inside of the tube E, and so that the windage or escape of gas may be equal on all sides of the ball. The tube E thus enables the pressure of the powder-gas to act directly on the end of the ball, giving it additional force,

and at the same time protecting the shot-barrel from being fouled by the burned powder. The ring D keeps the axes of the barrels and the foul-protector all coincident and central.

When occasion requires the auxiliary barrel A is removed from the shot-gun barrel, and then the latter may be used separately.

The Cartridgechamber rabbet Hin the barrel A is made deeper than the thickness of the cartridgeange, in order to hold the spiral extractor K and enable it to act on said `flange and start or extract the cartridge-shell after firing, or before, if desirable.

IOO

The extractor K is a ring out across its face at one point, as shown at Fig'. l1, shaped into a spiral, as shown at Figs. 8 and 10, and tempered, so that it may be pressed into a plane by the cartridge-ange, and then expand by its spring force, as in F10'. S, and start the cartridge from the chamber when the pressureis relieved.

Any suitable breech mechanism may be used lWith my improvements; but I prefer that orzle of the former by means of a screw thread or connection which permits their axes to coincide in any position, and the adjusting-ring D, all constructed and arranged to operate substantially in the manner and for the purposes described.

2. The combination, substantially as hereinbefore set forth7 oi' a shot-gun barrel with an auxiliary rifle-barrel provided with an adj usting-ring, D, and a foul-protecting and gascontining tube adapted to the inside of the shot-gun barrel, the axes of the shot-gun barrel, the rifle-barrel, and the foul-protector being,` all coincident in any position of revolution of either as to the other, substantially in the manner and for thc purposes described.

CLARK R. SHEL'ION.

Witnesses:

L. E. MUNsEN, 0. H. D. FoWLEn. 

